Strange Bug

[Airman]

I am fairly inexperienced with Java, but have done a good bit of programming. I wrote a complicated Mandelbrot Fractal Generator, but it is giving me some problems. I was writing it on a windows 7 computer, and whenever I clicked on the screen it was supposed to zoom in to the fractal at that position. The problem is that when I click on the screen it zooms in to the position I clicked, than zooms in again to the new position my mouse is at, in rapid succession, making it difficult to choose the location to zoom in to. I couldn't figure out why it was occurring so I had the drawing part of the program only work every other time it was called, which worked. Strangely, when I compiled and ran the program on my XP computer it didn't work with my fix, but did work with the original code.

[WingedPanther]

Without seeing the code, we can't help you. It's probably an issue with how the two OS's are sending click events, however.

[Airman]

Attached is the code. Version 2 is the one that works on the XP computer. The only difference between them is that lines 141 and 148 are commented out. The code is really messy, I must apologize for that...

[ZekeDragon]

Ahh, troubleshooting platform independent code... Well, as far as I can tell MandelbrotTest2 works fine, except for that the drawing routines clear the window then place the new drawing which causes flashing each time I click somewhere. It's not terrible for an experiment, but I figure I should bring it up. MandelbrotTest alternates between an empty screen and a drawn screen, making it difficult to figure out where it's supposed to be, but I encountered no problems with rapid-succession zooming.

I'll look at it further and tell you if I notice anything.

[Airman]

The flash you described in MandelbrotTest2 is not the error - And your description of Mandelbrot test is what it does when I run it on my XP computer. Meaning that your computer is working the same way my XP is. What operating system and versions of Java are you running?

[WingedPanther]

Are you using the same JRE on both machines? MicroSoft has one, and Java has several versions. There's a chance this isn't a code issue, but an environment issue.